List of number one songs in January, 2009

What songs were number one in January, 2009? There were 2 UK #1 songs in January, 2009.

These number one songs in January, 2009 began with Hallelujah by Alexandra Burke which went to #1 on 27th December, 2008 and remained at the top spot for 3 weeks.

The last number one song of 2009 was Just Dance by Lady Gaga which went to #1 on 17th January, 2009 and remained at the top spot for 3 weeks.